Finding the Fourth Proportional to 2,215.00, 3,056.64 and 1,220.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,215.00 : 3,056.64 = 1,220.37 : x
2. Step 2: Convert to fraction form
   2,215.00/3,056.64 = 1,220.37/x
3. Step 3: Cross multiply
   2,215.00x = 3,056.64 × 1,220.37
4. Step 4: Simplify right side
   2,215.00x = 3,730,215.72
5. Step 5: Solve for x
   x = 3,730,215.72/2,215.00
6. Step 6: Final answer
   x = 1,684.07